package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Category;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.FlavorMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {


    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private FlavorMapper flavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private CategoryMapper categoryMapper;

    /**
     * 新增菜品与口味
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithflavors(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        Long id = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0)
        {
            flavors.forEach(f->{
                f.setDishId(id);
            });
            flavorMapper.insert(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 删除菜品
     * @param ids
     */
    @Override
    public void delete(List<Long> ids) {
        //判断是否起售
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }

        }

        //判断是否在套餐中
        List<Long> setmealDishIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealDishIds != null && setmealDishIds.size() > 0)
        {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删菜品
        //删口味
        for (Long id : ids) {
            dishMapper.deleteById(id);
            flavorMapper.deleteByDishId(id);
        }

    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithflavors(Long id) {
        Dish dish = dishMapper.getById(id);
        Category category = categoryMapper.getById(dish.getCategoryId());
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setCategoryName(category.getName());
        List<DishFlavor> list = flavorMapper.getByDishId(id);
        dishVO.setFlavors(list);
        return dishVO;
    }

    /**
     * 修改菜品数据
     * @param dishDTO
     */
    @Override
    public void updateWithFlavors(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        flavorMapper.deleteByDishId(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0)
        {
            flavors.forEach(f->{
                f.setDishId(dishDTO.getId());
            });
            flavorMapper.insert(flavors);
        }
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = flavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    /**
     * 根据分类ID查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> getByCategoryId(Integer categoryId) {
        List<Dish> list = dishMapper.getByCategoryId(categoryId);
        return list;
    }
}
